I/73 HKE Sydney Catalog (Eichhorn+ 1983)
Catalogue of 20457 star positions obtained by photography in the declination
zone -48 to -54°(1950)
Eichhorn H., Googe W.D., Lukac C.F., Murphy J.K.
<Astron. J. 88, 546 (1983)>
=1983AJ.....88..546E 1983AJ.....88..546E
=1983yCat.1073....0E 1983yCat.1073....0E
ADC_Keywords: Positional data ; Photographic catalog
Abstract:
The methods for constructing a catalogue of 20457 star positions for
the epoch 1964 between -48 and -58° declination are described. The
positions were obtained by the overlap method, and images generated by
a coarse diffraction grating were employed to control magnitude-related
effects on the position. A selection of about 2 faint Astrographic
Catalog (AC) stars per square degree was included to serve as material
for the eventual determination of magnitude effects on the AC positions.
The standard error of a catalogued position estimate based on 2 images
is 0.12'' in either coordinate.
Description:
The plates were exposed on the Taylor, Taylor and Hobson catalogue
camera of the Sydney Observatory, always west of the pier, from Feb.13
to Oct.29, 1964. Each plate covers an area of 6x6° with a scale of
116.1''/mm. The declinations of the plate centers were always -51°
(in 1950 equinox). The average epoch is 1964.47 (see table 1 of the
paper for the epochs of the individual fields).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 78 20457 The Catalog of 20457 star positions
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See also:
I/5 : Cape Photographic Catalog 1950.0 (CPC) (Jackson+ 1954-1968)
I/116 : Cape Photographic Catalog 1950.0 (CPC) (Jackson+ 1954-1968)
I/85 : Cape Photographic Catalogue 2 (CPC2) (Nicholson+ 1984)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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2- 4 I3 --- CPz [-54/-47]? Zone of CPD number (Cat. I/108)
6- 10 I5 --- CPn ? Number in CPD zone (Cat. I/108)
17- 19 A3 --- Src Source catalog identification (2)
21- 25 I5 --- ID Star or plate number in the "Src" catalog
26 A1 --- n_ID [*] An asterisk indicates a reference star
33- 34 I2 h RAh Right Ascension B1950 (hours) (1)
36- 37 I2 min RAm Right Ascension B1950 (minutes) (1)
39- 43 F5.2 s RAs [0/60.00] Right Ascension B1950 (seconds) (1)
49 A1 --- DE- Declination B1950 (sign) (1)
50- 51 I2 deg DEd Declination B1950 (degrees) (1)
53- 54 I2 arcmin DEm Declination B1950 (minutes) (1)
56- 59 F4.1 arcsec DEs [0/60.0] Declination B1950 (seconds) (1)
65- 68 F4.1 mag mp ? Photovisual or photographic magnitude
73 I1 --- Nm ? Number of central image measurements
78 I1 --- Ns ? Number of pairs of diffraction spectra
contributing to the position
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Note (1): position of the mean coordinate system B1950 on the system of the
FK4, at the average epoch 1964.475 (individual field epochs are given
in Table 1 of the paper)
Note (2): Source catalogues are:
A = Gill and Hough 1923, "Zone Catalogue of 20843 stars in the Zone
-40/-52°, Cape of Good Hope; see also Cat. I/5
B = Jackson and Stoy 1955, "Cape Photographic Catalog 1950.0";
see Cat. I/116
1-120 = plate number in Cape Astrographic Catalog -49°
121-240 = 120+plate number in Cape Astrographic Catalog -51°
241-360 = 240+plate number in Cape Astrographic Catalog -53°
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History:
The magnetic tape was originally prepared by Heinrich K. Eichhorn
(University of Florida) and mailed to Carlos Jaschek (CDS) in
Februrary 1982.
(End) Francois Ochsenbein [CDS] 01-Oct-2012